Valve



` L. E. JOHNSTON Ago 5 y i924.

VALVE Filed Dc. 8, 1922 2 Sheets-Sheet. l

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Aug. 5 19214. www? L. E. JOHNSTON Lf?. Jhwan INVWTOR WlTNESS:

Patented Aug. 5, 1924.

ITED STATES LAWRENCE E. JOHNSTON, 0F ST. LOUIS, MISSOURI.

VALVE.

Application led December 8, 1922. Serial No. 605,686.

Be it known that I, LAWRENCE E. JOHN- sToN, a citizen of the United States, residing'at St. Louis` in the StateV of Missouri, have invented new and useful Improvements in Valves, of which the following is; a specification.

This invention relates to internal combustion engines, and more particularly to the valves therefor.

The invention has for its object, the provision of a rotary valve, and contemplates a construct-ion which assures a leak proof valve, and one which prevents` carbon from accumulating around the valve and its seat, thereby maintaining the efficiency of the moftor, and also eliminating the trouble usually experienced with dirty valves.

The nature and advantages of the invention will be better understood when the following detailed description is read in connection with the accompanying drawings, the invention residing in the construction, combination and arrangement of parts as claimed.

In the drawings forming part of this application, like numerals of reference indicate similar parts in the several views, and wherein:

Figure 1 is a side elevation of engine head equipped with the valve mechanism.

Figure 2 is a longitudinally sectional view therethrough. y

Figure 3 is a transverse sectional view.

Figure 4L is adeta'il'view of one of the valves.

Figure 5 is a detail view of one of the adjusting yokes.

Figure 6 is a sectional view taken on the line 6 6 of Figure 1, looking in the direction of the arrows.

Referring to the drawings in detail, 10 indicates the head of an internal combustion engine, which is provided with an inlet port 10 and an exhaust port 11 for each cylinder, and further provided with a vertical bore 13 which communicates with said ports as illustrated. The bore 13 is tapered toward its lower end, and adjacent this end there is a tapered shoulder 14 upon which the adjacent end of a cylindrical valve 15 reposes. The valve 15 is of course correspondingly tapered to lit snugly within the bore 13, and the valve isprovided with an opening 16 which is adapted to alternately communicate with the inlet and outlet ports above mentioned.` Thesel ports together with the openings 16 are of such size that the charge of fuel can be quickly admitted into the combustion chamber, and the exhaust gases permitted to escape in quick order. The valve is provided with an annular flange 17 which surrounds the upper end of the valve and reposes upon the head 10 being arranged within a large ai'inular recess 18 formed in the head, so that the flange 17 lies substantially fiush with the upper surface of the head. It will be noted that the valve is hollow, and ythat the in` terior of the valve communicates with the combustion chamber of the adjacent cylinder of the engine, the construction which permits the size of the combustion chamber to be regulated for high compression motors. The valve is provided `with spiral grooves 19 to assist in lubricating the valve and the wall of the valve seats in a manner to be hereinafter described.

The flange of each valve is provided with an annular series of teeth 20, and meshing with these teeth is a bevel gear 21 which 1s carried by an overhead shaft 22, the latter being journalled in a housing construction indicated generally at A. This shaft 22 may be` rotated in any suitable manner, Vand it is of course understood that there is one of the bevel gears for each of said valves. The valves for the respective cylinders are so arranged, and the shaft operated at 'a speed for a proper timing of the valves as will be appreciated.

The housing above referred to is made up of a plurality of substantially dome shaped portions 25, there being one of these portions arranged above each valve and provided with a gasket 26 which is positioned in the recesses formed in the head of the valve around the flange 16 thereof. The shaft operates in a lubricant which is adapted to be contained in the housing which also lubricates the driving connection between the shaft and the valves. The head 10 is provided with a vertical bore 26 which is arranged in juxtaposition to each bore 13, and this bore 26 opens into the bore 13 at points above and below the opening' in the valve. Consequently, the oil from the housing enters the bore 26 which also opens at the top of the head, and passes from the bore 26 to the spiral passages of the valves, which carries the lubricant upwardly in a manner to effectively vlubricate both the valve and its seat.

Arranged in each dome shaped portion of the housing is a two part yoke, the respective parts being indicated at 28 and connected together by suitable fastening elements 29. `The shaft 22 passes through all of these yokes, and each yoke is mounted for sliding adjustment within its particular portion of the housing, for the purpose tov be presently set forth. The lowerA part of each yoke is provided with a spherical portion 29 which is received within a socket or recess 30 formed in the upper end of the valve, vwhile the upper part of the yoke is formed Vwith semi-spherical depressions indicated at 31. Each dome shaped portion is provided with a central opening to receive a threaded adjusting element 32 which terminates to provide a ball like extremity 32 received by the depression 3l of the adjacent yoke, so that by tightening this element' 32 the yoke is depressed against the valve to hold the latter effectively seated, and thereby render the valve leak proof. Each yoke is providedv with" lugsA 34 which project: from the end thereof, and are received within' the opposite grooves 35 which guide the yokes in their adjustments. The construction and opera tion of the valve mechanism is such, that' carbon is not allowed to accumulate around the valve or tlievalve seat, and in addition to eliminating trouble usually experienced with dirty valves the motor will always operate with a high degree of efficiency.

While it is believed that from the foregoing'description, the nature and advantages of the invention will be readily apparent, I desire to have it understood that I do not limit myself to what is herein shown and described and thatV such changes may be resorted to when desired as fall within the scope of what is claimed.

Having thus described the invention, I claim:

1. In an internal combustion engine, a

head having inlet `and exhaust ports, and al communicating bore arranged at a right angle thereto, a hollow valve arranged in said bore and having an opening adapted to alternately communicate with saidports,

a shaft jfournalled in the housing, means for j rotatingsaid valve incident tothe rotationV of said shaft, an adjustable yoke arranged within each portion of the housing and receiving said shaft, each yoke including aV spherical portion seated in the recess of said valve, and means for adjusting said yoke whereby the latter holds thevalve effectively seated. l

2. In an internal combustion engine, a head having inlet and exhaust ports, anda communicating bore arranged at a' right angle thereto, a hollow valve arranged in said bore and having an opening adapted to alternately'communicate with said ports, a flange arranged at one end ofth'evalveand reposing on said head, teeth on saidflange, a housing including spaced portions arranged above each valve,va.shaf.tjo'urnaled in said housing, a gear carried by the shaftfor each valve and arranged inlone end of said portions ofthe housing, said gea-r mesh ino` with the teeth of the flange whereby the vave is rotated incident to the rotation of theshaft, a hole slidable on each portionl of the housing, and bearing` against the` flangeY of said valve, and an adjustable element pro'- jecting from theV top of said housing and 'connected witlrsaid yoke, whereby the'latter` can be adjusted to effectively hold the valve seated.

In testimony whereof I affixl my signature.

LAWRENCE E. JOHNSTON. 

